have you tried to re-emerge glibc? my glibc version is 2.15-r3 on amd64
do you have exotic CFLAGS, etc?
have you tried revdep-rebuild?
what does nscd do, if you run directly from command-line? does it complain about some libraries?

I re-emerged glibc-2.15-r3 on my amd64 system but this didn't help.

In /etc/make.conf for my Intel quad-core system:

Code:

CFLAGS="-march=nocona -O2 -pipe"

I revdep-rebuild weekly when I emerge.

Code:

# /usr/sbin/nscd
/usr/sbin/nscd: already running

but rc-status shows nscd as stopped.

In fact, rc-status shows bothnscd and consolekit as stopped even though /var/run has entries for both nscd and ConsoleKit.
In /var/log/rc.log: